NetBSD/usr.bin/quota/quota.c

611 lines
13 KiB
C

/* $NetBSD: quota.c,v 1.50 2014/07/13 01:46:04 dholland Exp $ */
/*
* Copyright (c) 1980, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Robert Elz at The University of Melbourne.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1980, 1990, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)quota.c 8.4 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: quota.c,v 1.50 2014/07/13 01:46:04 dholland Exp $");
#endif
#endif /* not lint */
/*
* Disk quota reporting program.
*/
#include <sys/param.h>
#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/mount.h>
#include <sys/socket.h>
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fstab.h>
#include <grp.h>
#include <netdb.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <quota.h>
#include "printquota.h"
struct quotause {
struct quotause *next;
uid_t id;
struct quotaval *qvs;
unsigned numqvs;
char fsname[MAXPATHLEN + 1];
struct quotahandle *qh;
};
static int anyusage(struct quotaval *, unsigned);
static int anyover(struct quotaval *, unsigned, time_t);
static const char *getovermsg(struct quotaval *, const char *, time_t);
static struct quotause *getprivs(id_t, int);
static void heading(int, const char *, id_t, const char *, const char *);
static int isover(struct quotaval *qv, time_t now);
static void printqv(struct quotaval *, int, time_t);
static void showgid(gid_t);
static void showgrpname(const char *);
static void showonequota(int, const char *, id_t, const char *,
struct quotause *);
static void showquotas(int, const char *, id_t, const char *);
static void showuid(uid_t);
static void showusrname(const char *);
static int unlimited(struct quotaval *qvs, unsigned numqvs);
static void usage(void) __dead;
static int qflag = 0;
static int vflag = 0;
static int hflag = 0;
static int dflag = 0;
static uid_t myuid;
static int needheading;
int
main(int argc, char *argv[])
{
int ngroups;
gid_t mygid, gidset[NGROUPS];
int i, gflag = 0, uflag = 0;
int ch;
myuid = getuid();
while ((ch = getopt(argc, argv, "dhugvq")) != -1) {
switch(ch) {
case 'g':
gflag++;
break;
case 'u':
uflag++;
break;
case 'v':
vflag++;
break;
case 'q':
qflag++;
break;
case 'h':
hflag++;
break;
case 'd':
dflag++;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (!uflag && !gflag)
uflag++;
if (dflag) {
#if 0
if (myuid != 0)
errx(1, "-d: permission denied");
#endif
if (uflag)
showquotas(QUOTA_IDTYPE_USER, "user", 0, "");
if (gflag)
showquotas(QUOTA_IDTYPE_GROUP, "group", 0, "");
return 0;
}
if (argc == 0) {
if (uflag)
showuid(myuid);
if (gflag) {
if (dflag)
showgid(0);
else {
mygid = getgid();
ngroups = getgroups(NGROUPS, gidset);
if (ngroups < 0)
err(1, "getgroups");
showgid(mygid);
for (i = 0; i < ngroups; i++)
if (gidset[i] != mygid)
showgid(gidset[i]);
}
}
return 0;
}
if (uflag && gflag)
usage();
if (uflag) {
for (; argc > 0; argc--, argv++) {
if (alldigits(*argv))
showuid((uid_t)atoi(*argv));
else
showusrname(*argv);
}
return 0;
}
if (gflag) {
for (; argc > 0; argc--, argv++) {
if (alldigits(*argv))
showgid((gid_t)atoi(*argv));
else
showgrpname(*argv);
}
return 0;
}
/* NOTREACHED */
return 0;
}
static void
usage(void)
{
const char *p = getprogname();
fprintf(stderr, "Usage: %s [-Dhguqv]\n"
"\t%s [-Dhqv] -u username ...\n"
"\t%s [-Dhqv] -g groupname ...\n"
"\t%s -d [-Dhguqv]\n", p, p, p, p);
exit(1);
}
/*
* Print out quotas for a specified user identifier.
*/
static void
showuid(uid_t uid)
{
struct passwd *pwd = getpwuid(uid);
const char *name;
if (pwd == NULL)
name = "(no account)";
else
name = pwd->pw_name;
if (uid != myuid && myuid != 0) {
warnx("%s (uid %d): permission denied", name, uid);
return;
}
showquotas(QUOTA_IDTYPE_USER, "user", uid, name);
}
/*
* Print out quotas for a specified user name.
*/
static void
showusrname(const char *name)
{
struct passwd *pwd = getpwnam(name);
if (pwd == NULL) {
warnx("%s: unknown user", name);
return;
}
if (pwd->pw_uid != myuid && myuid != 0) {
warnx("%s (uid %d): permission denied", name, pwd->pw_uid);
return;
}
showquotas(QUOTA_IDTYPE_USER, "user", pwd->pw_uid, name);
}
/*
* Print out quotas for a specified group identifier.
*/
static void
showgid(gid_t gid)
{
struct group *grp = getgrgid(gid);
int ngroups;
gid_t mygid, gidset[NGROUPS];
int i;
const char *name;
if (grp == NULL)
name = "(no entry)";
else
name = grp->gr_name;
mygid = getgid();
ngroups = getgroups(NGROUPS, gidset);
if (ngroups < 0) {
warn("getgroups");
return;
}
if (gid != mygid) {
for (i = 0; i < ngroups; i++)
if (gid == gidset[i])
break;
if (i >= ngroups && myuid != 0) {
warnx("%s (gid %d): permission denied", name, gid);
return;
}
}
showquotas(QUOTA_IDTYPE_GROUP, "group", gid, name);
}
/*
* Print out quotas for a specified group name.
*/
static void
showgrpname(const char *name)
{
struct group *grp = getgrnam(name);
int ngroups;
gid_t mygid, gidset[NGROUPS];
int i;
if (grp == NULL) {
warnx("%s: unknown group", name);
return;
}
mygid = getgid();
ngroups = getgroups(NGROUPS, gidset);
if (ngroups < 0) {
warn("getgroups");
return;
}
if (grp->gr_gid != mygid) {
for (i = 0; i < ngroups; i++)
if (grp->gr_gid == gidset[i])
break;
if (i >= ngroups && myuid != 0) {
warnx("%s (gid %d): permission denied",
name, grp->gr_gid);
return;
}
}
showquotas(QUOTA_IDTYPE_GROUP, "group", grp->gr_gid, name);
}
static void
showquotas(int idtype, const char *idtypename, id_t id, const char *idname)
{
struct quotause *qup;
struct quotause *quplist;
needheading = 1;
quplist = getprivs(id, idtype);
for (qup = quplist; qup; qup = qup->next) {
showonequota(idtype, idtypename, id, idname, qup);
}
if (!qflag) {
/* In case nothing printed, issue a header saying "none" */
heading(idtype, idtypename, id, idname, "none");
}
}
static void
showonequota(int idtype, const char *idtypename, id_t id, const char *idname,
struct quotause *qup)
{
static time_t now;
struct quotaval *qvs;
unsigned numqvs, i;
const char *msg;
qvs = qup->qvs;
numqvs = qup->numqvs;
if (now == 0) {
time(&now);
}
if (!vflag && unlimited(qvs, numqvs)) {
return;
}
if (qflag) {
for (i=0; i<numqvs; i++) {
msg = getovermsg(&qvs[i],
quota_idtype_getname(qup->qh, i),
now);
if (msg != NULL) {
heading(idtype, idtypename, id, idname, "");
printf("\t%s %s\n", msg, qup->fsname);
}
}
return;
}
/*
* XXX this behavior appears to be demanded by the ATF tests,
* although it seems to be at variance with the preexisting
* logic in quota.c.
*/
if (unlimited(qvs, numqvs) && !anyusage(qvs, numqvs)) {
return;
}
/*
* XXX: anyover can in fact be true if anyusage is not true,
* if there's a quota of zero set on some volume. This is
* because the check we do checks if adding one more thing
* will go over. That is reasonable, I suppose, but arguably
* the resulting behavior with usage 0 is a bug. (Also, what
* reason do we have to believe that the reported grace expire
* time is valid if we aren't in fact over yet?)
*/
if (vflag || dflag || anyover(qvs, numqvs, now) ||
anyusage(qvs, numqvs)) {
heading(idtype, idtypename, id, idname, "");
if (strlen(qup->fsname) > 4) {
printf("%s\n", qup->fsname);
printf("%12s", "");
} else {
printf("%12s", qup->fsname);
}
for (i=0; i<numqvs; i++) {
printqv(&qvs[i],
quota_objtype_isbytes(qup->qh, i), now);
}
printf("\n");
}
}
static void
heading(int idtype, const char *idtypename, id_t id, const char *idname,
const char *tag)
{
if (needheading == 0)
return;
needheading = 0;
if (dflag)
printf("Default %s disk quotas: %s\n", idtypename, tag);
else
printf("Disk quotas for %s %s (%cid %u): %s\n",
idtypename, idname, idtypename[0], id, tag);
if (!qflag && tag[0] == '\0') {
printf("%12s%9s %8s%9s%8s%8s %7s%8s%8s\n"
, "Filesystem"
, "blocks"
, "quota"
, "limit"
, "grace"
, "files"
, "quota"
, "limit"
, "grace"
);
}
}
static void
printqv(struct quotaval *qv, int isbytes, time_t now)
{
char buf[20];
const char *str;
int intprtflags, over, width;
/*
* The assorted finagling of width is to match the previous
* open-coded formatting for exactly two quota object types,
* which was chosen to make the default report fit in 80
* columns.
*/
width = isbytes ? 9 : 8;
intprtflags = isbytes ? HN_B : 0;
over = isover(qv, now);
str = intprt(buf, width, qv->qv_usage, intprtflags, hflag);
printf("%*s", width, str);
printf("%c", over ? '*' : ' ');
str = intprt(buf, width, qv->qv_softlimit, intprtflags, hflag);
printf("%*s", width-1, str);
str = intprt(buf, width, qv->qv_hardlimit, intprtflags, hflag);
printf("%*s", width, str);
if (over) {
str = timeprt(buf, 9, now, qv->qv_expiretime);
} else if (vflag && qv->qv_grace != QUOTA_NOTIME) {
str = timeprt(buf, 9, 0, qv->qv_grace);
} else {
str = "";
}
printf("%8s", str);
}
/*
* Collect the requested quota information.
*/
static struct quotause *
getprivs(id_t id, int idtype)
{
struct quotause *qup, *quptail;
struct quotause *quphead;
struct statvfs *fst;
struct quotakey qk;
int nfst, i;
unsigned j;
qup = quphead = quptail = NULL;
nfst = getmntinfo(&fst, MNT_WAIT);
if (nfst == 0)
errx(2, "no filesystems mounted!");
for (i = 0; i < nfst; i++) {
if (qup == NULL) {
if ((qup = malloc(sizeof *qup)) == NULL)
err(1, "Out of memory");
}
qup->qh = quota_open(fst[i].f_mntonname);
if (qup->qh == NULL) {
if (errno == EOPNOTSUPP || errno == ENXIO) {
continue;
}
err(1, "%s: quota_open", fst[i].f_mntonname);
}
qup->numqvs = quota_getnumidtypes(qup->qh);
qup->qvs = malloc(qup->numqvs * sizeof(qup->qvs[0]));
if (qup->qvs == NULL) {
err(1, "Out of memory");
}
qk.qk_idtype = idtype;
if (dflag) {
qk.qk_id = QUOTA_DEFAULTID;
} else {
qk.qk_id = id;
}
for (j=0; j<qup->numqvs; j++) {
qk.qk_objtype = j;
if (quota_get(qup->qh, &qk, &qup->qvs[j]) < 0) {
if (errno != ENOENT && errno != ENODEV) {
warn("%s: quota_get (objtype %u)",
fst[i].f_mntonname, j);
}
quotaval_clear(&qup->qvs[j]);
}
}
(void)strlcpy(qup->fsname, fst[i].f_mntonname,
sizeof(qup->fsname));
if (quphead == NULL)
quphead = qup;
else
quptail->next = qup;
quptail = qup;
quptail->next = 0;
qup = NULL;
}
free(qup);
return quphead;
}
static int
unlimited(struct quotaval *qvs, unsigned numqvs)
{
unsigned i;
for (i=0; i<numqvs; i++) {
if (qvs[i].qv_softlimit != QUOTA_NOLIMIT ||
qvs[i].qv_hardlimit != QUOTA_NOLIMIT) {
return 0;
}
}
return 1;
}
static int
anyusage(struct quotaval *qvs, unsigned numqvs)
{
unsigned i;
for (i=0; i<numqvs; i++) {
if (qvs[i].qv_usage > 0) {
return 1;
}
}
return 0;
}
static int
anyover(struct quotaval *qvs, unsigned numqvs, time_t now)
{
unsigned i;
for (i=0; i<numqvs; i++) {
if (isover(&qvs[i], now)) {
return 1;
}
}
return 0;
}
static int
isover(struct quotaval *qv, time_t now)
{
return (qv->qv_usage >= qv->qv_hardlimit ||
qv->qv_usage >= qv->qv_softlimit);
}
static const char *
getovermsg(struct quotaval *qv, const char *what, time_t now)
{
static char buf[64];
if (qv->qv_usage >= qv->qv_hardlimit) {
snprintf(buf, sizeof(buf), "%c%s limit reached on",
toupper((unsigned char)what[0]), what+1);
return buf;
}
if (qv->qv_usage < qv->qv_softlimit) {
/* Ok */
return NULL;
}
if (now > qv->qv_expiretime) {
snprintf(buf, sizeof(buf), "Over %s quota on", what);
return buf;
}
snprintf(buf, sizeof(buf), "In %s grace period on", what);
return buf;
}